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My lawn mower runs at over speed even with throttle in idle…

Customer Question
My lawn mower runs...

My lawn mower runs at over speed even with throttle in idle position. Is the problem internal governor related or linkage to carb?

Mechanic's Assistant: What's the make and model of the mower? And can you guesstimate how old it is?

Honda Harmony mower with 160 engine. Probably 10 to 15 years old. I am not the first owner.

Mechanic's Assistant: Do you plan on doing the work yourself?

Yes. I have tried to adjust linkage at the shaft where it comes out of the engine.

Mechanic's Assistant: Anything else we should know to help you best?

I have basic skills but can use his mower as a learning project.

Submitted: 8 months ago.Category: Small Engine
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Answered in 18 minutes by:
9/12/2017
Technician: Curtis B., Technician replied 8 months ago
Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 30,594
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Verified

Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!

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Technician: Curtis B., Technician replied 8 months ago

If you hold the lever that comes from the engine shaft, does it have posh.pull if you work throttle by hand? If not push/pull, the inner governor parts are broken. And repair would be to disassemble engine to get at the governor parts.

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Customer reply replied 8 months ago
The engine is over speeding regardless of throttle cable position. Is that what you are asking?
Technician: Curtis B., Technician replied 8 months ago

overspeed occurs either from the throttle in carburetor coming loose, or governor not controlling the speed. If governor has no control, push or pull when you hold throttle and rev engine by hand, governor is fault. Have you checked the throttle flap and throttle shaft in carb?

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Customer reply replied 8 months ago
I just pushed the governor lever ahead by hand and the engine slowed down. The lever stays back with throttle control in idle.
Should there be a spring on carb to return it to idle?
Technician: Curtis B., Technician replied 8 months ago

Governor should pull it back. Engine make and model? Briggs single cylinder?

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Customer reply replied 8 months ago
Honda 160 on harmony II hrt 216 sda mower? The spring on the governor rod doesn't seem to do anything.
Technician: Curtis B., Technician replied 8 months ago

Yes, because the inner governor in engine is broken.

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Customer reply replied 8 months ago
Thanks. I'll pull it apart and see if I can learn anything. Not much to lose.
Technician: Curtis B., Technician replied 8 months ago

What is the engine model? Has to be something before the 160.

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Technician: Curtis B., Technician replied 8 months ago

GCV160, see link , # 9 is the governor and rod.

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Technician: Curtis B., Technician replied 8 months ago
Ask Your Own Small Engine Question
Technician: Curtis B., Technician replied 8 months ago

I see question is still open, did you see my response?

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Curtis B.
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Category: Small Engine
Satisfied Customers: 30,594
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Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert

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